Want sneakers that can tie themselves? Prepare to spend a lot of cash.

Nike confirmed Monday it will sell its HyperAdapt 1.0 self-lacing shoes on December 1 for $720. The sneakers — inspired by a pair worn in the film Back to the Future II — were originally going to release this month.

Pricing details were first revealed by YouTuber Jacques Slade, who runs a channel devoted to the latest sneakers.

The self-lacing HyperAdapts will use a magnetic adapter to charge the shoes. The kicks fully recharge after 3 hours and battery life lasts up to two weeks. Button on the tongue of the shoe let the user tighten or loosen the laces.